Control system



July 12, 1938. J. H. s. HAMER CONTROL SYSTEM Original Fi. led Aug. 12,1932 INVENTOR Jam 11. S. Harmer 00544: M P M ATTORN EYS I 15 mechanism.

Reissued July 12, 1938 UNITED STATES 20,19: .coN'raor. srs'rnu James S.Hamer, Brooklyn, N. Y., assignor to Trans-Luz Corporation, a corporationof Del- 2,023,420, dated December 10, 1935, 628,532, August 12, 1932.Application for reissue December 19, 1936, Serial No.

12 Claims. (CI. 88-24) My invention relates to a system wherein theeffect of a jet of .air or other fluid on anelectrical switch orequivalent, is controlled by a tape, web or thelike.

'5 In the disclosed form of my invention, an arrangement is shown fordrawing a characterbearing tape through a. projection field afterejection of said tape from a suitable printing device, such as thewell-known stock ticker mechanism.

10 It is well understood in ,the art that the aforesaid tape should movethrough the projection field regularly and evenly in contradistinctionto the non-uniform, irregular and intermittent manner in which it isdelivered from the stock ticker In accordance with my invention,

the mechanism for pulling the tape through the projection field iscontrolled by the tapedtself in the general manner described abovewhereby there is obtained the desired regular and even 20 movement ofthe tape through said projection field.

Various other advantages, characteristics and features of my inventionwill become apparent from the following detailed description taken in 26connection with the accompanying drawing.

My invention resides in the system, arrangement, features andcombination of parts of the character hereinafter described and claimed.

For an understanding of my'invention and for 30 an illustration of oneof the forms thereof, reference is to be had to the accompanyingdrawing,

in which:

Figure 1 is an elevational view, partly broken away, of a tape-pullingsystem embodying the 35 features of my invention;

Pig. 2 is an enlarged perspective view illustrating parts of my novelarrangement; and

Fig. 3 is a diagramillustrating the control circuit of the tape-pullingmotor.

40 Referring to Fig. 1, A represents any suitable device for printingcharacters on a tape or web. The device A may be and ordinarily is astock ticker mechanism which, as herein generally shown, comprises ahousing I, a reel 2, a printing 1 45 wheel I, and a movable platen I.'I'he tape T, which is .transparentor semi-transparent in the exampleshown, comesfrom the reel! and passes between the wheel 3 and the platen4 where the printing operation occurs.

so In a manner'well-understood in the art, the

tape T is ejected from the ticker A in a non-uniform, irregular andintermittent manner, said tape .1 passing from left to right, Fig. 1,across, the projection table I of a projector 13 which may as be of anysuitable character and which, in the example shown, is generally asdisclosed in the copending Halloran application Serial No. 373,767,filed June 26, 1929, and which has become Patent No. 1,952,249, datedMarch 27, 1934. Accordingly, said projector B is shown ascomprising abase 6 supporting a housing 1 from which rises a standard 8 carrying asuitable projection lens 9. The housing I contains a suitable source oflight III, a condensing arrangement, not shown, and a mirror ll wherebythe beam of light is caused to pass upwardly through that section of thetape T framedby the projection a driven roll it and then is wound upon areel l after passing around an idler roll it. The tape T is positivelyheld in driving relation with respect to the roll M by a roll I! carriedby a pivoted arm l8 which is biased in a counterclockwise direction,Fig. 1, by a suitable spring IS.

The aforesaid driving roll it is mounted on a suitable shaft carrying apulley operated by an endless belt 20 which extends over and is drivenby a pulley 2| rotated by the armature shaft, of a suitable electricmotor C. The above noted shaft also carries a second pulley foroperating an endless belt 22, preferably ailexible spring belt, whichextends over and drives a pulley 23 carried by the same shaft whichcarries the reel I5.

Preferably, a retarding or .bralring action is exercised on the tape Tas it enters the projection field 5. Any suitable arrangement may thusbe utilized such, for example, as herein shown as" comprising a slottedmember 24 guided by screws 24a for free reciprocatory movement in avertical direction on a flxedsupport 25, the member 24 being biasedunder the influence of'gravity toward the projection table I and, whenthe tape T is disposed therebeneath, exercising the desired brakingaction thereon.

Usually, the arrangement is such that the roll it pulls tape across theproj c ion table 5 Bubj stantiallyin correspondence with the averagerate at which the tape is elected by the ticker. In ordinary commercialpractice, the ticker operates in an irregular,intermittent mannerand,there fore, it becomes necessary to vary the operation of the roll llunder control of the motor C in accordance with the rate at which tapeis ejected by the ticker. This, in accordance with my invention, isaccomplished ina highly advantageous and satisfactory manner.

As illustrative of one arrangement which has proven satisfactory inoperation, there is shown on the drawing a pair of .switch contactelements 26 and 21 disposed adjacent the entrance to the projectionfield and somewhat below the level thereof. The contact element 26 iscarried by an electricity-conducting arm 2611 which is supported in theposition shown on the drawing in any suitable manner. The contactelement 21 is carried by an electricity-conducting arm 21a suitablysecured, in insulated relation, to the arm 26a, the latter also beingsuitably insulated from its support. The arm 21a is formed of suitableresilient material and is freely movable as hereinafter described. The.arm 260., however, is relatively rigid and stationary. Normally, theposition of'the spring arm 21a is as illustrated in Fig. 2, the contactelements 25 and 21 being,

in non-contacting relation when said arm 21a is thus positioned.

Connected to the contact element 26 is a conductor 28 which leads to oneterminal of the aforesaid motor C, the other terminal of which hasconnected thereto a conductor 29 which includes a suitable source ofcurrent, not shown, and which is connected to the contact element 21.

In accordance with my invention, an arrangement is provided, the normaltendency of which is to maintain the contact element 21 closed upon thecontact element 2B but which becomes inefi'ective to accomplish thisresult soon after operation of the ticker A is discontinued. To thisend, there may be utilized an arrangement such as illustrated wherein amotor 3| isshown as operating an airpump 32 to continuously move astream of air through a conduit 33. The nozzle 33a. of said conduit 33is so arranged as to direct the stream of air toward the movable contactAs clearly appears from the drawing, the taped T issues from the tickerA fiatwise and so remains as it passes across the projection table 5which is alined with the path taken by the tape as it leaves the ticker.The switch element 21 together with its button 21b is disposed directlybeneath the tape T. The conduit nozzle 33a is so directed that the pathof the tape T is between the end thereof and the switch contact element21, 21b.

The operation is as follows:

The arrangement is such that the roll II, when operating at normalspeed, pulls the tape across the projection table 5 at approximately thespeed at which tape is ejected from the ticker A during nomial,non-interrupted operation thereof. As the parts are related in Fig. 1,it is assumed that the ticker A is operating as last stated and that theroll I4 is pulling the tape across the projection table 5 at its normalrate of speed.

It will be noted that a downwardly extending loop L exists in the tapebetween the ticker A and the projection table 5. Accordingly, the streamof air issuing from the nozzle 33a.- strikes the tape and, due to thefact that thetape loop L is of substantial depth, the tape is heldagainst the button 211). Since the tape thus oii'ers little or noobstruction to the stream of air, it results that the contact element 21is held in engagement with the contact element 26 and, accordingly, thecircuit of the motor C remains closed with resultant operation of. theroll Id.

In the event that operation of the ticker A ceases, the loop L shortensordecreases in depth and, as a result, the tape inthe loop formationbecomes more or less taut. As the tape loop shortens, the tape tends toand does move upwardly from the button 21b and, in so doing, takes on afunction as a shield to prevent application of force to said button 21bby the stream of air flowing from the nozzle 33a.- When this happens,the contact element 21 moves from the contact element 26 under theinfluence of spring arm 21a whereupon the motor C is deenergized andoperation of the roll I4 is discontinued.

The parts remain in the relation last stated until operation of theticker A is again initiated. At this time, the first action results inincrease in depth of the loop L whereupon the jet of air again becomeseffective to move the switch element 21 into engagement with theadjacent switch element 26. When this occurs, the circult through themotor 0 is again completed and the latter, by operation of the roll I4,again operates to pull tape across the projection table 5, thiscontinuing until operation of the ticker A is again discontinuedwhereupon the sequence 0 steps described above again occurs.

The member 24 operates, as stated, to apply a braking action to the tapeT. As a result, transmission of impulses generated by the ticker A tothe tape section on the projection table 5' is substantially preventedand, accordingly, the projected imagesmove across the screen smoothlyand without jump.

Operation of the roll I4 as above described is effected by transmissionof power to the shaft carrying the same by the belt 20. Operation ofsaid last named shaft eflfects operation of the belt 22 which serves torotate the reel l5 and wind the tape thereon.

While the invention has been described with respect to a certainparticular preferred example which gives satisfactory results, it willbe understood by those skilled in the art after understanding theinvention, that various changes and modifications may be made withoutdeparting from the spirit and scope of the invention and it is intendedthereforein the appended claims to cover. all such changes andmodifications.

What is claimed as new and desired to be secured by Letters Patent is:

1. In combination, a switch, means for directing an operating jet of airtoward said switch, and a tape movable in loop formation between saidswitch and said means, the length of the tape loop controlling operationof said switch by said jet of air. v

2. In combination, means for pulling a tape along a path, and means:for' controlling operation of said pulling means, said controllingmeans comprising a switch and a conduit for directing an operating jetof air toward said switch, said tape, at times, rendering said jet ofair ineilective to control said switch.

3. In combination, means'for pulling 'a tape along a path, andmeans forcontrolling, operation of said pulling means, said controlling meanscomprising a switch and a conduit for directinga jet of air toward saidswitch,'said jet of air toward said switch, said tape,

tape controlling operation of said switch by said jet 01' air.

4. In combination, means for pulling a tape along a path, and means forcontrolling operation of said pulling means, said controlling meanscomprising a switch and a conduit for di- 'recting a jet or air towardsaid switch, said tape moving along a path between said conduit andswitch and controlling operation of said switch by said jet of air.

5. In combination, a printing device irom which a printed tape isejected; means for pulling said tape through a projection field, andmeans for controlling operation of said pulling means, said controllingmeans comprising a switch and a conduit for directing an operatingrendering said jet of air ineiiective to control said switch.

6. In combination, a printing device from which a printed tape isejected, means for pulling said tape through a projection field, andmeans for controlling operation of said pulling means, said controllingmeans comprising a switch and a conduit for directing an operating jetor air toward said switch, said tape, moving along a path between saidswitch and conduit and, at times, rendering said jet of air inefiectiveto control said switch.

7. In combination. a printing device from which a printed tape isejected, means for pulling said tape through a projection field, andmeans for controlling operation or said pulling means, said controllingmeans comprising a switch and a conduit for directing an operating jet01 air toward said switch, a loop in said tape between said printingdevice and said projection field changing in depth and, at times,rendering said jet 01' air ineflective to control said switch.

8. In combination, a printing device from which a printed tape isejected intermittently and at an irregular rate, means for pulling saidtape through a projection field, a switch comprising a movable elementfor controlling oper' ation oi said pulling means, and a conduit fordirecting a jet or air toward said switch element, said tape, when saidprinting device and said at times, turning which a printed tape isejected intermittently and at an irregular rate, means for pulling saidtape through a projection field, a switch comprising a movable elementfor controlling operation of said pulling means, and a conduit fordirecting a jet of air toward said switch element. said tape, when saidprinting device and said means operate non-synchronously with respect toeach other, preventing control of said switch element by said jet ofair, said tape, when said printing device and said pulling means operatesynchronously with respect to each other, re-

the control of said switch element to said jet of air.

10.'In combination, a printing device from which a printed tape isejected, saidvtape forming a loop between said printing device and aprojection field, a switch comprising a movable switch element disposedat one side of the tape loop, and a conduit at the other side of saidtape loop for directing a jet or air toward said switch element. 11. Incombination. a printing device from which a printed tape isejected, saidtape form,- ing a loop between said printing device and a projectionfield, a switch comprising amovable switchelement disposed adjacent oneside or the tape loop, and on the opposite side of said tape loop aconduit irom whicha jet of air imues, said jet of air tending to retainthe tapein contact with said movable switch element.

12. In combination, a printing device from which a printed tape isejected, a cmduit tor pulling means operate non-synchronously .withrespect to each other, preventing control of said switch-element by saidjet of air.

9. In combination, a printing device from directing ajet or air on thetem tation between saidprinting devlceand arprojection fieldwhereby'said tape section is maintained-in loop formation, means forpulling said. tape through said projection field, and means on theopposite sideoi thetapeanddisposedinthe directpath of said jet of air 1'controlling said tape pulling means.

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